#!/usr/bin/python

# This is statement is required by the build system to query build info
if __name__ == '__build__':
	raise Exception

'''
smooth.c from the Redbook examples.  
Converted to Python by Jason L. Petrone 7/00

/*
 * Copyright(c) 1993-1997, Silicon Graphics, Inc.
 * ALL RIGHTS RESERVED 
 * Permission to use, copy, modify, and distribute this software for 
 * any purpose and without fee is hereby granted, provided that the above
 * copyright notice appear in all copies and that both the copyright notice
 * and this permission notice appear in supporting documentation, and that 
 * the name of Silicon Graphics, Inc. not be used in advertising
 * or publicity pertaining to distribution of the software without specific,
 * written prior permission. 
 *
 * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
 * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
 * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
 * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
 * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
 * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
 * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
 * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
 * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
 * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
 * 
 * US Government Users Restricted Rights 
 * Use, duplication, or disclosure by the Government is subject to
 * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
 *(c)(1)(ii) of the Rights in Technical Data and Computer Software
 * clause at DFARS 252.227-7013 and/or in similar or successor
 * clauses in the FAR or the DOD or NASA FAR Supplement.
 * Unpublished-- rights reserved under the copyright laws of the
 * United States.  Contractor/manufacturer is Silicon Graphics,
 * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
 *
 * OpenGL(R) is a registered trademark of Silicon Graphics, Inc.
 */
'''

'''
/*
 * smooth.c
 * This program demonstrates smooth shading.
 * A smooth shaded polygon is drawn in a 2-D projection.
 */
'''

import sys, struct

try:
  from OpenGL.GLUT import *
  from OpenGL.GL import *
  from OpenGL.GLU import *
except:
  print '''
ERROR: PyOpenGL not installed properly.  
        '''
  sys.exit()


def init():
   glClearColor(0.0, 0.0, 0.0, 0.0)
   glShadeModel(GL_SMOOTH)

def triangle():
   glBegin(GL_TRIANGLES)
   glColor3f(1.0, 0.0, 0.0)
   glVertex2f(5.0, 5.0)
   glColor3f(0.0, 1.0, 0.0)
   glVertex2f(25.0, 5.0)
   glColor3f(0.0, 0.0, 1.0)
   glVertex2f(5.0, 25.0)
   glEnd()

def display():
   glClear(GL_COLOR_BUFFER_BIT)
   triangle()
   glFlush()


def reshape(w, h):
   glViewport(0, 0, w, h)
   glMatrixMode(GL_PROJECTION)
   glLoadIdentity()
   if(w <= h):
      gluOrtho2D(0.0, 30.0, 0.0, 30.0 * h/w)
   else:
      gluOrtho2D(0.0, 30.0 * w/h, 0.0, 30.0)
   glMatrixMode(GL_MODELVIEW)

def keyboard(key, x, y):
   if key == chr(27):
      sys.exit(0)


glutInit(sys.argv)
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB)
glutInitWindowSize(500, 500) 
glutInitWindowPosition(100, 100)
glutCreateWindow('Smooth')
init()
glutReshapeFunc(reshape)
glutKeyboardFunc(keyboard)
glutDisplayFunc(display)
glutMainLoop()
